Toxicity of Insecticides to Chrysoperla zastrowi arabica (Henry) Under Laboratory Conditions Daval S. K.1, Mehendale S. K.1,*, Hegade P. B.1, Desai V. S.1, Kadam J. J.2 Department of Agril. Entomology, College of Agriculture, Dapoli-415712, Maharashtra 1Dept. Agril. Entomology, Dr. B.S.K.K.V, Dapoli 2Assistant Professor, Dept. of Plant Pathology, College of Agriculture, Dapoli *Email: hegadepb@gmail.com
Online published on 15 December, 2016. Abstract A laboratory experiment was conducted at Department of Agricultural Entomology, College of Agriculture, Dapoli, during September to December 2013 to study the toxicity of insecticides against of Chrysoperla zastrowi arabica (Henry). The results revealed that, considering the eggs, insecticides viz. cypermethrin 25 EC (0.0075), spinosad 45 SC (0.01) and imidacloprid 17.8 EC (0.0053) were found highly toxic which caused more than 40 per cent egg mortality. While insecticides viz. dimethoate 30 EC (0.03), azadirachtin 10000 ppm (0.004), thiomethoxam 25 WG (0.005) and deltamethrin 2.8 EC (0.0025) were found moderately toxic to eggs of C. zatrowi arabica which caused 20–40 per cent egg mortality. Based on effects of toxicity of the tested insecticides the safety of insecticides was as follows: cypermethrin 25 EC (0.0075) > spinosad 45 SC (0.01) > imidacloprid 17.8 EC(0.0053) > dimethoate30 EC (0.03)> azadirachtin 10000 ppm (0.004) > thiomethoxam 25 WG (0.005) > deltamethrin 2.8 EC (0.0025). Considering toxicity of insecticides against 2nd instar larvae of C. zastrowi arabica, the insecticides viz. cypermethrin 25 EC (0.0075), spinosad 45 SC (0.01), imidacloprid 17.8 EC (0.0053), dimethoate 30 EC (0.03), thiomethoxam 25 WG (0.005) and deltamethrin 2.8 EC (0.0025) were found to be highly toxic to larvae of C. zatrowi arabica and they caused more than 40 per cent larval mortality. The insecticide azadirachtin 10000 ppm (0.004) was found to be safer to larvae of C. zatrowi arabica. Top Keywords C. zastrowi arabica, C. cephalonica, A. craccivora, Toxicity. Top |